Development and Research of Properties Cement Concrete Hardening Accelerator Additive Based on a Mixture of Inorganic Fluorine-Containing Salts

Abstract

the article describes the basic salts and their mixtures used to accelerate the hardening process of cement concretes in the practice of modern construction. Development and main characteristics of the additive accelerating process of hardening of cement concrete are presented. This additive is based on a mixture of non-organic fluorinated salts. The composition of the additive allows to accelerate the process of hardening of cement stone, due to the formation of insoluble and dense compounds. A number of experiments were carried out to determine the optimal amount of fluoride salts in the additive. The results of the research showed a low consumption of additive per 1 m3 of heavy concrete. Advantages and disadvantages of the additive allow us to recommend its use to accelerate the hardening of concrete in a wet environment. The article provides a detailed description of the test methods. The tests were carried out using certified and verified measuring instruments taking into account the strength characteristics of the materials. As a result, the dependence of the concrete hardening rate on the amount of additive used was revealed. The article also discusses some proposals for the practical use of additive in the production technology of concrete and reinforced concrete. According to the results of destructive and non-destructive testing, an increase in the strength of concrete by >30% compared to conventional concrete.